Response: blob() method
The blob() method of the Response interface takes
a Response stream and reads it to completion. It returns a promise that
resolves with a Blob.
Syntax
js
blob()
Parameters
None.
Note: If the Response has a
Response.type of "opaque", the resulting Blob
will have a Blob.size of 0 and a Blob.type of
empty string "", which renders it useless for methods like
URL.createObjectURL.
Return value
A promise that resolves with a Blob.
Examples
In our fetch request example (run fetch request live), we
create a new request using the Request() constructor,
then use it to fetch a JPG. When the fetch is successful, we read a Blob
out of the response using blob(), put it into an object URL using
URL.createObjectURL, and then set that URL as the source of an
<img> element to display the image.
js
const myImage = document.querySelector("img");
const myRequest = new Request("flowers.jpg");
fetch(myRequest)
.then((response) => response.blob())
.then((myBlob) => {
const objectURL = URL.createObjectURL(myBlob);
myImage.src = objectURL;
});
Specifications
| Specification |
|---|
| Fetch Standard # ref-for-dom-body-blob① |
Browser compatibility
BCD tables only load in the browser